Figure 1

Intra-individual variability in reaction time (RT) (a), and mean RT (b) in each sample subgroup (Class 1 = high cognition, high D2DR availability; Class 2 = low cognition, low D2DR availability; Class 3 = low cognition, high D2DR availability60). Boxplots display the median and upper and lower quartile, and error bars the largest/smallest value within the 1.5 interquartile range from the upper/lower quartile.